Staybolt for boilers



UNITED STATES PATENT OFFICE.

JOHN ROGERS FLANNEBY, ETHAN I. DODDS. AND CHARLES HYLAND, 0F PITTS- BURGH, PENNSYLVANIA, ASSIGNORS 1'0 FLANNERY BOLT COMPANY, OF PITTS- BURGH, PENNSYLVANIA.

STAYBOLT FOB BOILERS.

Application filed March 7,

To all whom it may concern Be it known that we. .lonx R. FLANNERY. ll'rnAN I. Donns, and npiiinns llrmrcn, citizens of the United Stats, and residents of Pittsburgh, in the county of .illegheny and State of Peruisylvaiiia have iurented certain new and useful lin u'ovomeiits in Htaybolts lor lloilers; and we do hereby do claro the 'lollowing to be a lull. vi ar, an exact description oi the invention, sui'h in; will enable others skilled in the art t w ich it appertains to make and use the 52:1

This invention relates to iinproronieuts n sti rbolls for boilers; and more particularly to suvh as are made with tell tale holes, one object of the hire tion being): to so oozistrurt a staybolt of tubular iron rlth a con tinuous bore extending from end to end thereof. that the head shall be applied th r to in such manner that no portion o 1 bore will be closed or eontratted dining;- the operation of applying the head. and so that the end ol the bore may be (in id by a sc raie member at the outer leaded end 0 bolt and. be continuous from mid hilti'difltt' closing: member to the inner end of the bolt.

ith this and other objrrts in view, thr invention consists in certain !l0.'il features oi construction and (-omhinatiims of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure l is a longitudinal sectional view of a staybolt embodying our invention; Fig. 2 is a. cross sertion of the same. Figs. 3, 4-. 5 and 6 are views showing slight modifications, and Fig. 7 is a view of a modification.

The body l of the bolt may comprise two mated members 2-3 welded together and so "formed as to provide a continuous longitudinal bore extending through said body lr'otn end to end thereof, said bore constituting a tell-tale hole 4: for the bolt which will be continuous through the body of the bolt from one boiler sheet to the other and which is accessible from the inner end of the bolt,- the outer end of said bore at the outer headed end of the bolt being closed. To etl'ect the permanent closing of the bore or tell-tale hole at the outer headed end of the bolt, we may drive a metal plug 5 into the end of the bore as shown in Figs. 1,3 and 7; or We may seal the end of the bore by applying a Welded patch 6 to the end of the bolt body,

Specification of Letters Patent.

Patented Jan. 4, 4921.

1917. Serial No. 153,123.

as shown in Fig. l; or the end of the bolt body may be made with a threaded socket receiving; a threaded plug T as shown in Fig. or the metal at lhr end of the bolt body may be spun in a manner to close the end oi" the bore. as indraled at in Fig, 6. ilh our iur miyenwnlo, th tubular land portion (it the bolt is provided with r: roiiir'led head in such manner that then w ll no longer of i-losi igf the bore for a prohibitive distance iuirarlly beyozrl the [55 head when the holy of the bolt is being pro iitl l 'fil'h the mind the appliealio'roi' the head i diluted and its pe manent c nnection nsured. l'e are therefore onabled to avoid the closing; (it the telltale 7 hole i r, prohibitive distance from the head as would be liublc to occur if :i head be forged at the end of the t bular body portion or" the bolt.

In the embodiment of our nvention shown in Fig. 1 the inner end oi" the bolt is pro tired wth a: he 1 9 of the button head type to l ner a ust the inner bolus; sheet a d :uljarrn to said h adv the bolt is three-l rd 2-: t W t screw through said inn r l'z ih-r s The telltale hole extends throuqh the lJllilAIlL-lifli!ll nner Qllll of the boll and may be losed by a temporary or removable plug ll.

The outer end portion or the bolt body threaded, as at 12. to receive the outer head 2,3. This head is made in the "Form of on interiorly threaded sleeve and its outer face is convex so that when it is in place on the end oi the bolt body, the latter will be provided with a bearing head of partly Epl'lGPhul form and produce a. striu'ture of the flexible etaybolt type.

After the head shall have been screwed onto the threaded outer end of the bolt, we

u- (er to weld the threaded connection as indicated by dotted lines in Fig. 1. This may be readily accomplished by electrical welding, viz, by including the head and the bolt body in the circuit of a suitable source of electrical energy.

After the head shall have been screwed onto the bolt body, the outer plugged end of the latter may be upset over the outer end of the head, as indicated at 14.. in Fig. 1.

If desired, the upsetting of the end of the bolt body might be omitted, and the annular the reception of a wrench, as indicated in Fig. 3.

\Vith our improvements, the tubular body portion of the bolt may he provided with a rounded head in such manner that there will be no danger of closin a prohibitive Jortion of the bore when the body of the be t is being provided with the head, and the application of the head is facilitated and its permanent connection insured.

In the construction shown in Fig. 7, the separate head at the outer end of the bolt is omitted and the removable plug is inserted into the bore at the headed inner end of the bolt.

llaving fully described. our invention what we claim as new and desire to secure by Let ters Patent, is

1. A staybolt comprising a body portion having a bore extending from end to end, a separate head encircling, the outer end por tion of the body of the bolt and secured there to. and means independent of said head. elosing the outer end of said bore.

2, A staybolt for boilers comprising a bar having a here from end to end, a permanent closure for the outer end of said bore, a temporary closure for the inner end of said bore, and a separate annular head permanently secured to the outer end of the bar, independently of the closure for the bore in said bar.

3. A staybolt having a bore extending through the same from end to end and threaded externally at its outer end, a sepa rate annular internally threaded head havin; a rounded bearing face, screwed on the threaded outer end portion of the bolt body and permanently welded thereto, and means independently of Said head closing the bore at the outer end of said bolt body.

4-. A staybolt having a longitudinal bore extending through the same from end to end, a plug permanently closing the outer end of said bore, a separate head secured to the plugged end of the body, and an upset portion on the outer end of said body portion and overlying said separate head and engaging said plug.

5. A staybolt having a longitudinal bore extending through the same from end to end, a button head at the inner end of the bolt, a separate bearing head secured on the outer end of said bolt. and means pernmnently closing, the end of the here at the outer end of the bolt to which the bearing head is secured.

6. A staybolt having a long bore extendiu through same from end to end, a buttonhead at the one end of the bolt, the bore permanently closed at the outer end of the bolt, and a removable plug being inserted at said. headed end of the bolt.

In testimony whereof, We have signed this specification in the presence of two subscribing Witnesses.

JOHN ROGERS FLANNERY. ETHAN I. DODDS. CHARLES HYLAND.

\Vitnesses EnWiN S. Bren, HAROLD SCHUNEMAN. 

